Retarded-release triple-valve device.



W. V. TURNER.

RETARDED RELEASE TRIPLE VALVE DEVICE.

APPLICATiON FILED SEPT. 14, 190B.

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WITNESSES WK Wax/1;:

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W. V TURNER.

RETARDED RELEASE TRIPLE VALVE DEVICE.-

APPLICATION FILED SEPT. 14, 1908.

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WBTNESSES INVENTOR v 3 An'y' THE NORRIS PETERS Cu. FHOTC-LITHQ, WASHING TON, D. c.

W. V. TURNER.

RETARDED RELEASE TRIPLE VALVE DEVICE.

APPLICATION FILED SEPT. 14, 1908.

1,134,425., Patented Apr. 6, 1915.

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WETNESSES INVENTOR i W %W V I Atty.

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WALTER V. TURNER, OF EDGEWOOD, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR BRAKE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

RETARDED-RELEASE TRIELE-VALVE DEVICE.

Application filed September 14, 1908.

To all whom it may concern Be it known that I, WVALTER V. TURNER, a citizen of the United States, residing at Edgewood, in the county of Allegheny and $tate of Pensylvania, have invented new and useful Improvements in Retarded-Release Triple-Valve Devices, of which the following is a specification.

This invention relates to fluid pressure brakes, and more particularly to a triple valve device adapted to retard the release of the brakes at the head end of the train so as to-secure a more uniform and simultaneous release of the brakes throughout the train and of that type comprising a main slide valve, the movement of which from normal full release position to an inner position restricts or cuts oii the flow of air from the brake cylinder through the exhaust port, so as to retard the release of the brakes, an auxiliary or graduating valve having a movement relative to the main valve for controlling the supply of air to the brake cylinder in service applications of the brakes, and a yielding resistance device for opposing the inward movement of the valve parts from full release to the retarded release po sition.

One object of my invention is to provide a construction of the above character in which the yielding resistance device is carried by the moving parts of the triple valve device.

Another feature of my improvements consists in confining the resistance spring between fixed abutments so as to provide an initial compression in the spring whereby a more uniform and certain resistance is interposed to resist the movement of the parts from the full to the retarded release position.

Still another object of my invention is to provided an improved retarded release triple valve device which is compact and durable and which may be handled in shipping or otherwise without liability to damage.

In the accompanying drawings; Figure 1 is a central sectional view of a triple valve device embodying one form of my improvements, showing the parts in full release position; Figs. 2 and 3 similar views but showing the parts respectively in retarded release and service application positions; Fig. i a fragmentary sectional view on line 5-5 of Fig. 1; Fig. 5 a central sectionof a triple valve device with another form of my in- Specification of Letters Patent.

Patented Apr. 6, 1915.

Serial No. 452,991.

vention applied thereto, showing the parts in full release position; Figs. 6 and 7 similar views, showing the parts respectively in retarded release and service application positions; and Fig. 8 a fragmentary section taken on the line '66 of Fig. 5.

According to the construction illustrated in Figs. 1, 2, 3, and l of the drawings, 1 provide a triple valve casing 1, having piston chamber 2 containing triple valve piston 3 and valve chamber at containing the main slide valve 5 and an auxiliary or graduating valve 6 mounted on and having. a movement relative to said main valve. The main slide valve 5 is provided with cavity 7 for connecting the brake cylinder port 8 with exhaust port 9 in normal full release position and service port 36 controlled by the auxiliary valve 6 and adapted in service position to register with brake cylinder port 8, so as to supply air from the auxiliary reservoir to the brake cylinder in the usual manner. I

In order to retard the release of the brakes the main slide valve 5 is adapted to be moved by the triple Valve piston 3 to an inner retarded release position in which the flow 01 air from the brake cylinder through the exhaust port is restricted or entirely cut ofi' and a yielding resistance means is provided for opposing or resisting the movement of the main valve and the triple piston to the retarded release position.

According to one form of my improvements, the yielding resistance device comprises a coil spring 15 mounted on a stem 14 having a flanged end against which one end of the spring bears. The other end of the spring engages the end portion of a thimble section 12 which fits over the end of the stem 14:. The spring is thus confined between fixed abutments, and by forcing the thimble section 12 inwardly the spring 15 is compressed and may be held under such compression by inserting a pin 16 through a properly located hole in the stem 14:, the thimble 12 being provided with apertures 17 against the end walls of which the pin 16 is adapted to bear and resist outward movement of the thimble and the spring 15. The apertures are of sufficient extent to permit of the inward movement of the parts in traveling. from full release to the retarded release position.

7 The above construction is preferably 7 mounted in a centrally arranged chamber 11 of the triple valve. piston and stem, the,

chamber being closed by a suitable screw cap at its outer end and being of sufficient.

depth to permit the desired free. relative movement of the parts.

The. stem 14 is rigidly connected to the main slide valve by means of a pin 18, which is adapted to be inserted in place through apertures 20 and.21,,located respectively in the "wall of the chamber 11 and in'the thimble 12, by adjusting the parts so that the apertures are in alinemer'it.

The pinlS projects'outfar enough t0 en-.

gage in an'aperture formed in a forward extension of the main valve 5"so as 'to form a V rigidfconnection thereto.

Theopposition "to movement from full release position to the inner retarded release position is brought about by providing an extended pin 22 adapted to have free'endwise'movementthrough the triple valve pis- I suitable manner-to the'triple valvecasing or bushing.

- 'Thepin 22 is of such length as to fill the space between the abutment; 23 and the thimble =12 when theparts'are' in'full'release posi tion so that further inner movement of the parts to the' retarde'drelease position causes I the pin-22itoact'as a stop for. the thimble 12 and consequently the pressed. i V V A service application of thebrakes-may-be made in the usual manner bylreducing the brake pipe pressure, whereupon the higher spring 15- is coma'u'xiliar'y reservoirp'ress'ure causes the triple piston and the auxiliary slide valve to move 1 forward, closing the feed-groove 40 around the triple piston, uncovering service port 36,

and-then as the lost motion is taken up bei tween'the piston-'and-main slide valve, both movetogether to service position, in which theservic'e port 36 registers with'b'rake cylinder port 8 and air flows from the auxiliary reservoir to the brake cylinder. In taking up this lost motion it will benoted that the yielding resistance device moves freely in the chamber 11, and thus the movement of the piston and auxiliary valve is not impeded.

in the usual manner for releasing the brakes the triple piston moves to fullrelease posi tion in which the pin'22 engages the fixed abutment 23 as shown in Fig. 1. On the cars atthe head end of thetrain the increase in brake pipe pressure is much greaterthan releaseposition. l

port 9 in there r On the cars at the rear end of the train the triple pistons move only to full'release position, astheincr'ease in brake pipe pressure is not suficient to movethe parts to the retarded release'position, thus a; more uniform "release of the brakes throughout the train is obtained. J

Asthepressures equalize onthetriple pistons at the head endof'the train',the springs 1'5return*thepartstofull release: position.

Asthes'pringfi acts directly onboth the,

main slide valve and the' piston, itwill be seen that thep'arts arereturn'e d to'fullrelease position. v'vithf the; normal relative positicn of the parts'retained in full' release position. fl

Anoth'er' =form of my improvements is shown'i'n Figs. 5, 6,"' 7,and 8 ofthe drawings in whichjlthe' operating pin'22 and fixed abutment 23 are dispensed with and ajtrans- 'versely arranged pin-28 is fixed in the thimble 24 similar-to the thimble 12 in the before described construction. The ends 'of'thje pin project out into recesses 29131113 inthe triple valve bushing 30, the recesses beingof such length that th'e pin 28*en'gages the rear end I Walls'of the recesseswhen the triple'valve w parts areiin full releasejposition. In this construction the valvesoperating pin 26 is securedto the-stem 25 by apin' 27 a'nd'extends up'wa'rd-ly so that the pin may engage ice the end Walls of recesses cut in the socket section {245 and thereby hold the resistance spring-1 5" under 5 the desired initial compres sion, said-f recesses being of suflicient depth to permit the' d'esi'red relative miove'ment of the'pin 26; It will-now be se'enthatthe yielding resistance-device is adapted to move with the main valve andfperm'i't-of the free relative movement of the triple" piston and the-au-xiliary valve as'in the'firstfdescribed construction. :Inthe inward movement of the triple valve piston from'the full release position to retarded release positionon the ance tothe movement of the parts and as When-the brake pipe pressure is lncreased turns the main valve and triple piston tofull It will now be seen that with presentinvention' a retarded release triple valve device is provided wherein-the main slide. valve is of air frompthe brakecylinder through the equalization of-trainpipe and auxiliary resr ervoir :pressurestakes 'placerthe spring re exhaust port and in which an auxiliary valve having a movement relative to the main valve controls the brake cylinder service port in service applications of the brakes, the yielding resistance device being carried by the moving parts of the triple valve device.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a triple valve device, a valve mechanism comprising a piston subject to variations in brake pipe pressure, a main slide valve operated thereby for controlling the exhaust from the brake cylinder, said valve mechanism having a normal full release position and a retarded release position, an auxilary valve operated by said piston for controlling the brake cylinder service port, and yielding resistance means carried by said valve mechanism for opposing the movement of said main slide valve from the full release position to the retarded release position.

2. In a triple valve device, a main slide valve for controlling the exhaust from the brake cylinder, an auxiliary valve having a movement relative to the exhaust controlling valve for controlling the brake cylinder service port, a piston subject to variations in brake pipe pressure for operating said valves and a spring carried by the moving parts of the triple valve device for opposing the movement of the piston and exhaust valve from full release position to a position in which the exhaust opening from the brake cylinder is restricted.

3. A triple valve device consisting of a casing containing a valve mechanism comprising a main slide valve for controlling the exhaust from the brake cylinder, an auxiliary valve having a movement relative to said main valve for controlling the supply of air from the auxiliary reservoir to the brake cylinder in service applications of the brakes, a piston subject to variations in brake pipe pressure for operating said valves and a yielding resistance means carried by said valve mechanism for returning said main valve and piston from a position in which the flow of air from the brake cylinder through the exhaust port is restricted to the normal full release position.

4:. In a triple valve device a valve for controlling the brake cylinder exhaust having a full release position and a retarded release position, an auxiliary valve having a movement relative to the exhaust controlling valve, a piston subject to variations in brake pipe pressure for operating said valve and having a fixed relation to said auxiliary valve, and a spring carried by said piston for returning the exhaust valve and piston from the retarded release position to the full release position.

5. In a fluid pressure brake, the combination with a brake pipe and brake cylinder, of a valve and piston operated by variations in brake pipe pressure for controlling the brake cylinder exhaust, an auxiliary valve operated by and having the same traverse as said piston and having a movement relative to said exhaust controlling valve for controlling the brake cylinder service supply port, and a yielding resistance means carried by said piston for opposing the movement of the exhaust valve and piston from normal full release position to a position in which the flow of air from the brake cylinder through the exhaust port is restricted.

6. In a triple valve device, a valve for con trolling the brake cylinder exhaust, an auxiliary valve having a movement relative to the exhaust controlling valve for controlling the brake cylinder service supply port, a piston subject to variations in brake pipe pressure for operating said valves, and a yieldlng reslstance means mounted to operate wlth said exhaust valve and carried by the piston for opposing the movement of said exhaust valve from full release position to a position in which the exhaust opening from the brake cylinder is restricted.

7 A triple valve device comprising a casing containing a main valve for controlling the brake cylinder exhaust and having a full release position and a retarded release position, a piston subject to brake pipe pressure for actuating said valve, and a yielding resistance means carried by the moving parts of the triple valve device and acting directly on said valve for returning same from the retarded release position to the full release position.

8. In a triple valve device a main valve for controlling the brake cylinder exhaust and having a full release position and a retarded release position, an auxiliary valve for controlling the supply of air from the auxiliary reservoir to the brake cylinder in service application of the brakes, a piston subject to brake pipe pressure for operating said valves, and a spring device carried by said piston for returning the exhaust controlling valve and the piston from retarded release position to full release position and adapted to act directly on said main valve and piston.

9. In a triple valve device a valve for controlling the brake cylinder exhaust and having a normal full release position and a retarded release position in which the flow of air from the brake cylinder through the exhaust port is restricted, an auxiliary valve having a movement relative to the exhaust controlling valve for controlling the brake cylinder service supply port, a piston subject to brake pipe pressure for operating said valves, and a yielding resistance means carried by said piston and moving with said exhaust valve for opposing the movement of said exhaust valve from full :release position to retarded release position.

10. In a triple valve device a valve 'for controlling the brake cylinder exhaust and having a normal full release position and a retarded release position in which the flow of air from the brake cylinder throughthe exhaust port is restricted, an auxiliaryvalve release position to the full release position.

11. In a triple valvedevice,a valve :mechanisincomprising a main valve for-control ling the "brake cylinder exhaust and having a normal full release position and a retarded release position, a piston operated by. Varia tions in brake pipe pressure for controlling said valve, a spring carried by said valve mechanism, and a stop for engagingoneend of the spring in full release position, '':the other end of the spring beingada-ptedto act on the valve and piston arranged in parallel and therebyoppose the movement of said valve and piston from the fullrelease position to the retarded release position.

1-2. I-n'atriple valve device, a-valve for controlling thebrake cylinder exhaust havinga f-ullreleaseposition anda retarded release-position, a piston ,operated by varia- 06 m ot this patent mayv be.obtainediorifive cents each,"by;addressiiigtne f comniissioner of "Patents I Lil-84,426 V tions in brake pipe" pressure foracontrolling saidyalve, a yielding resistance-device car ried by said valve for-opposingthejmovementor samelfrom full release position to the'retarded'release position comprisinga spring, abutments for confining said spring under initial compression and having a limited"relative-movement, and 'a fixed stop for engaging one abutment in full release 7 position, the other abutment being adapted to engage the piston. -V 13. In a triple valve device, a main valve for controlling the brake {cylinder exhaust having a fullirelease and a retarded release position, an auxiliary valvefhavingia movement relative to' the main valve for. controlling the brake cyllnder servlceiport, ,a piston voperated by variations in brake pipe pressure, for controlling said valves, and a yielding resistance device carried: by and having movement With said main valve for Opposing the movement of said valve jrom full release position to retarded release position,'said yielding resistancedevice-compris ing a spring, telescoping sections between which the ,springis mounted, a v"stopjfor limiting the expansive movementfof the spring,gand a fixed stop for engaging on section ,in full release position. In testimony whereof I my hand.

. V WALTER V. TURNER.

Witnessesr, j .WM. M. OADY, V 7

'5 A. CLEMENTs. C

jrwa sl ington, 1).,03; f

have hereunto set 

